package com.wfms.common.util;

import java.io.UnsupportedEncodingException;

import org.apache.commons.lang.StringUtils;

public class StringUtil {
	
	/**
	 * 字符编码转换
	 * @param str
	 * @return
	 */
	public static String iso2utf(String str) {
		String result = StringUtils.stripToEmpty(str);
		try {
			result = new String(result.getBytes("ISO-8859-1"), "UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		return result;
	}
	
	/**
	 * 中文转码
	 * @param src
	 * @return
	 */
	public static String unescape(String src) {
		StringBuffer tmp = new StringBuffer();
		if(src == null)
		{
			return null;
		}
		tmp.ensureCapacity(src.length());
		int lastPos = 0, pos = 0;
		char ch;
		while (lastPos < src.length()) {
			pos = src.indexOf("%", lastPos);
			if (pos == lastPos) {
				if (src.charAt(pos + 1) == 'u') {
					ch = (char) Integer.parseInt(src
							.substring(pos + 2, pos + 6), 16);
					tmp.append(ch);
					lastPos = pos + 6;
				} else {
					ch = (char) Integer.parseInt(src
							.substring(pos + 1, pos + 3), 16);
					tmp.append(ch);
					lastPos = pos + 3;
				}
			} else {
				if (pos == -1) {
					tmp.append(src.substring(lastPos));
					lastPos = src.length();
				} else {
					tmp.append(src.substring(lastPos, pos));
					lastPos = pos;
				}
			}
		}
		return tmp.toString();
	}
	
	public static boolean isNullOrEmpty(String src)
	{
		return src==null || "".equals(src);
	}
	
	public static boolean isNullOrZeroEmpty(String src)
	{
		return src==null || "".equals(src) || "0".equals(src);
	}
	
	public static boolean hasInArray(String[] strArray,String str){
		boolean isIn = false;
		if(strArray==null || strArray.length==0 || isNullOrEmpty(str))
		{
			return isIn;
		}
		for(String inStr:strArray)
		{
			if(str.equals(inStr))
			{
				isIn = true;
				break;
			}
		}
		return isIn;
		
	}
	
	public static boolean isNullOrSizeZero(String[] strArray){
		return (strArray==null) || (strArray.length==0);
	}
	
	// 国标码和区位码转换常量
	static final int GB_SP_DIFF = 160;
	//存放国标一级汉字不同读音的起始区位码
	static final int[] secPosValueList = {
	1601, 1637, 1833, 2078, 2274, 2302, 2433, 2594, 2787,
	3106, 3212, 3472, 3635, 3722, 3730, 3858, 4027, 4086,
	4390, 4558, 4684, 4925, 5249, 5600};

	//存放国标一级汉字不同读音的起始区位码对应读音
	static final char[] firstLetter = {
	'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j',
	'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
	't', 'w', 'x', 'y', 'z'};

	//获取一个字符串的拼音码
	public static String getFirstLetter(String oriStr) {
		String str = oriStr.toUpperCase();
		StringBuffer buffer = new StringBuffer();
		char ch;
		char[] temp;
		for (int i = 0; i < str.length(); i++) { //依次处理str中每个字符
		ch = str.charAt(i);
		temp = new char[] {ch};
		byte[] uniCode = new String(temp).getBytes();
			if (uniCode[0] < 128 && uniCode[0] > 0) { // 非汉字
				buffer.append(temp);
			} else {
				buffer.append(convert(uniCode));
			}
		}
		return buffer.toString().toUpperCase();
	}

	/** 获取一个汉字的拼音首字母。
	* GB码两个字节分别减去160，转换成10进制码组合就可以得到区位码
	* 例如汉字“你”的GB码是0xC4/0xE3，分别减去0xA0（160）就是0x24/0x43
	* 0x24转成10进制就是36，0x43是67，那么它的区位码就是3667，在对照表中读音为‘n’
	*/

	public static char convert(byte[] bytes) {

		char result = '-';
		int secPosValue = 0;
		int i;
		for (i = 0; i < bytes.length; i++) {
			bytes[i] -= GB_SP_DIFF;
		}
		secPosValue = bytes[0] * 100 + bytes[1];
		for (i = 0; i < 23; i++) {
			if (secPosValue >= secPosValueList[i] && secPosValue < secPosValueList[i + 1]) {
					result = firstLetter[i];
				break;
			}
		}
		return result;
	}
}
